Please read About Tortes.
Have all ingredients at room temperature, about 70°F. Preheat the oven to 325°F. Grease and flour the bottom of a 9-inch springform pan and line with a round of parchment paper.
Beat in a large bowl, or in a stand mixer with the whisk attachment, at medium-high speed for 1 minute:
Gradually add, beating until thick and pale:
Fold in, blending well:
Using clean beaters (or clean the whisk attachment, transfer the yolk mixture to another bowl, and clean the mixer bowl), beat in a large bowl at medium-high speed until stiff but not dry:
Fold one-quarter of the egg whites into the batter, then fold in the remaining whites. Scrape the batter into the pan. Bake until a toothpick inserted into the center comes out clean, about 1 hour.
Let cool in the pan; the center will sink. To level and unmold, see About Tortes.
Spread with:
or serve with: